EP0017704A1 - Procédé de préparation d'un produit de condensation de phénothiazine et de p-nitrosophénol et son utilisation pour la préparation de colorants au soufre - Google Patents

Procédé de préparation d'un produit de condensation de phénothiazine et de p-nitrosophénol et son utilisation pour la préparation de colorants au soufre Download PDF

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Publication number
EP0017704A1
EP0017704A1 EP80100408A EP80100408A EP0017704A1 EP 0017704 A1 EP0017704 A1 EP 0017704A1 EP 80100408 A EP80100408 A EP 80100408A EP 80100408 A EP80100408 A EP 80100408A EP 0017704 A1 EP0017704 A1 EP 0017704A1
Authority
EP
European Patent Office
Prior art keywords
phenothiazine
nitrosophenol
parts
sulfuric acid
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80100408A
Other languages
German (de)
English (en)
Other versions
EP0017704B1 (fr
Inventor
Gert Dr. Nagl
Joachim Dr. Ribka
Ulrich Dr. Gotsmann
Heinz Dickmanns
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanofi Aventis Deutschland GmbH
Cassella Farbwerke Mainkur AG
Original Assignee
Cassella AG
Cassella Farbwerke Mainkur AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cassella AG, Cassella Farbwerke Mainkur AG filed Critical Cassella AG
Publication of EP0017704A1 publication Critical patent/EP0017704A1/fr
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Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D279/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one sulfur atom as the only ring hetero atoms
    • C07D279/10—1,4-Thiazines; Hydrogenated 1,4-thiazines
    • C07D279/14—1,4-Thiazines; Hydrogenated 1,4-thiazines condensed with carbocyclic rings or ring systems
    • C07D279/18—[b, e]-condensed with two six-membered rings
    • C07D279/34—[b, e]-condensed with two six-membered rings with hetero atoms directly attached to the ring sulfur atom
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B49/00—Sulfur dyes
    • C09B49/10—Sulfur dyes from diphenylamines, indamines, or indophenols, e.g. p-aminophenols or leucoindophenols

Definitions

  • the invention relates to a method for producing at least 60% by weight of indophenol S-oxide I. containing condensation product of phenothiazine and p-nitrosophenol.
  • this object can be achieved if such condensation products of phenothiazine and p-nitrosophenol are subjected to sulfurization in the baking or cooking melt, which are obtained with the use of an additional oxidizing agent and which are at least 60 % By weight of the indophenol S-oxide of the formula contain.
  • sulfur trioxide or excess p-nitrosophenol can be used as additional oxidizing agents.
  • p-nitrosophenol as a * condensation agent and as an additional oxidizing agent, at least 1.125 moles per mole of phenothiazine are used.
  • the condensation products of phenothiazine and p-nitrosophenol produced according to the older proposal are obtained in high yields and are practically free of starting and by-products, the presence of which leads to a reduction in the quality of the sulfur dyes produced from the condensation products.
  • the sulfur dyes have outstanding outstanding fastness and a valuable shade and can be produced with high yield, color strength and purity. They are completely soluble in alkali dithionite and alkali sulfide vats.
  • condensation products from phenothiazine and p-nitrosophenol which contain at least 60% by weight of the indophenol S-oxide of the formula I and only small amounts of starting and by-products, by condensation of phenothiazine in sulfuric acid even without the use of an additional Oxidizing agents can be obtained if the phenothiazine is dissolved in 60 to 90% sulfuric acid, preferably in 65 to 88.5% sulfuric acid and very particularly preferably in 70 to 86% sulfuric acid as the radical cation before the addition of p-nitrosophenol.
  • the condensation is advantageously carried out at temperatures from -20 ° to + 20 ° C, preferably from -10 ° C to + 10 ° C.
  • the reaction is slightly exothermic, so that the desired reaction temperature must be maintained by cooling. It is advisable to use a small excess of p-nitrosophenol. Usually 1.05 to 1.125 mol of p-nitrosophenol are used per mole of phenothiazine. Larger excesses of p-nitrosophenol do no harm, but are also not necessary.
  • the condensation products obtained are isolated in the customary manner, for example by introducing the reaction mixture into water, filtering off, washing out, neutralizing and drying.
  • the concentration data for the sulfuric acid are made in percentages by weight and, in the context of the present invention, relate only to the amount of the components water and H 2 SO 4 in the solutions or reaction mixtures.
  • the sulfuric acid consumption due to the oxidation of the phenothiazine and the salt formation as well as the formation of Water of reaction to be considered according to the following equation.
  • phenothiazine dissolves only slowly in dilute sulfuric acid, it is advisable to first dissolve the phenothiazine in 90 to 100% sulfuric acid and, before condensation with p-nitrosophenol, this solution to a sulfuric acid concentration of 60 to 90%, preferably 65 to 88 , 5%, very particularly preferably from 70 to 86%.
  • a sulfuric acid concentration 60 to 90%, preferably 65 to 88 , 5%, very particularly preferably from 70 to 86%.
  • normally 3.5 to 10 preferably 5 to 8 parts by weight of 96% to 100% sulfuric acid are used for 1 part by weight of phenothiazine. It is not necessary to use more than 10 parts by weight of 96% to 100% sulfuric acid to dissolve one part by weight of phenothiazine.
  • the condensation products produced according to the invention contain less than 6% by weight of phenothiazine and phenothiazine-S-oxide, generally even less than 4% by weight, and the sum of the chemically undefined by-products is less than 20%, generally even less 10%.
  • the main constituent of the condensation products produced according to the invention is the indophenol S-oxide of the formula I in a proportion of 60 to 100% by weight, preferably 80 to 100% by weight.
  • the condensation products prepared according to the invention contain the indophenol of the formula Ia in a proportion of 0 to 20% by weight. preferably 0 to 10% by weight.
  • the compounds of the formulas I and Ia can also be present in whole or in part in their tautomeric forms.
  • the yields of the process according to the invention are good. If the phenothiazine is dissolved in 70 to 86% strength sulfuric acid before the addition of the p-nitrosophenol, a condensation product with a content of the compound I of equal to or greater than 80% by weight is obtained in a yield of approximately 85% of theory or more receive. If the phenothiazine is outside the aforementioned range dissolved in 65 to 88.5% sulfuric acid, then the condensation product is obtained in about 80% yield with a percentage of compound I of 70 or more. If the phenothiazine is outside the aforementioned ranges in solution in 60 to 90% sulfuric acid, then the condensation product is obtained in a yield of about 75% with a percentage of compound I of 60 or more.
  • the condensation products produced according to the invention are outstandingly suitable for the production of sulfur dyes. They are converted by sulfurization in the baking or cooking melt in a manner known per se into sulfur dyes which give green to cotton and green to black dyeings on polyamide. These sulfurization processes are described, for example, in "Venkatarman, The Chemistry of Synthetic Dyes, Vol. 2 (1952), page 1062 ff. And page 1103 ff., And Vol. 7 (1974), page 24 ff., Academic Press, New York, San Francisco, London ".
  • the condensation products according to the invention are preferably sulfurized by the process of the hot melt. Cooking melts which work using alkali polysulfide are particularly suitable, with per mole of the sulfurized product.
  • ducts 2 to 6 moles, preferably 2.5 to 4 moles of sodium sulfide and 7 to 30 moles, preferably 13 to 18 moles of sulfur are used. They are carried out in the solvents customary for sulfur melts.
  • the sulfur dyestuffs which can be prepared from the condensation products prepared by the process according to the invention have excellent fastness properties and a valuable shade and are obtained with high yield, color strength and purity. They are in Alkali dithionite and alkali sulfide vat sufficiently soluble.
  • Example 1 shows the production of the condensation product according to the invention.
  • Example 2 shows the results which are obtained if the process according to the invention is not used.
  • Examples 3 and 5 show the production of sulfur dyes, starting from condensation products produced according to the invention.
  • phenothiazine 40 parts are concentrated in 250 parts (96% by weight) sulfuric acid dissolved with cooling at room temperature. Taking into account the consumption of sulfuric acid by oxidation of the phenothiazine and salt formation as well as the formation of water of reaction, the calculated concentration of sulfuric acid is 93.93%.
  • the solution is cooled to -5 ° C. and 30.5 parts of water-containing 85% strength p-nitrosophenol paste are added with cooling and vigorous stirring.
  • the reaction mixture is stirred for 4 hours at 0 ° C. with cooling. It is then poured into a vigorously stirred mixture of 1000 parts of water and 700 parts of ice. The product is filtered off with suction, washed with approx.
  • the dye is practically completely soluble in dithionite, sulfide and hydrogen sulfide vats.
  • Example 3 If, in Example 3, 44 parts of the condensation product of Example 2 are used instead of the condensation product of Example 1 and the procedure is otherwise as described in Example 3, about 60 parts of dye are obtained in powder form.
  • the dye differs from the dye of Example 3 by the significantly lower color strength, the much duller and bluer shade and the incomplete solubility in dithionite, sulfide and hydrogen sulfide vat.
  • a water-thin, clear, non-settling, durable solution of the reduced sulfur dye is obtained.
  • green dyeings of very good wet and light are obtained on the cellulose fiber without further addition of reducing agents fastness, on polyamide fibers green to deep black dyeings of good wet and light fastness.
  • the dye is particularly suitable for use in continuous dyeing processes.
  • Example 5 If 44 parts of the condensation product of Example 2 are used in Example 5 instead of the condensation product of Example 1 and the rest of the procedure is as described in Example 5, a dye is obtained which differs from the dye of Example 5 due to the significantly lower color strength , which distinguishes much duller and bluer nuance and the tendency to settle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen- Or Sulfur-Containing Heterocyclic Ring Compounds With Rings Of Six Or More Members (AREA)
  • Coloring (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Paper (AREA)
EP80100408A 1979-03-05 1980-01-28 Procédé de préparation d'un produit de condensation de phénothiazine et de p-nitrosophénol et son utilisation pour la préparation de colorants au soufre Expired EP0017704B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2908486 1979-03-05
DE19792908486 DE2908486A1 (de) 1979-03-05 1979-03-05 Verfahren zur herstellung eines kondensationsprodukts aus phenothiazin und p-nitrosophenol

Publications (2)

Publication Number Publication Date
EP0017704A1 true EP0017704A1 (fr) 1980-10-29
EP0017704B1 EP0017704B1 (fr) 1982-07-28

Family

ID=6064500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100408A Expired EP0017704B1 (fr) 1979-03-05 1980-01-28 Procédé de préparation d'un produit de condensation de phénothiazine et de p-nitrosophénol et son utilisation pour la préparation de colorants au soufre

Country Status (5)

Country Link
EP (1) EP0017704B1 (fr)
JP (1) JPS55118477A (fr)
BR (1) BR8001290A (fr)
DE (2) DE2908486A1 (fr)
ES (1) ES489179A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1867863A (en) * 1927-02-14 1932-07-19 Gen Aniline Works Inc Indophenol azine compounds
EP0001801A1 (fr) * 1977-10-29 1979-05-16 CASSELLA Aktiengesellschaft Produit de condensation de phénothiazine et de p-nitrosophénol, procédé de préparation de ce produit de condensation, procédé de préparation de colorants de soufre à partir de ce produit de condensation et les colorants de soufre préparés

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1867863A (en) * 1927-02-14 1932-07-19 Gen Aniline Works Inc Indophenol azine compounds
EP0001801A1 (fr) * 1977-10-29 1979-05-16 CASSELLA Aktiengesellschaft Produit de condensation de phénothiazine et de p-nitrosophénol, procédé de préparation de ce produit de condensation, procédé de préparation de colorants de soufre à partir de ce produit de condensation et les colorants de soufre préparés

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF THE CHEMICAL SOCIETY, Vol. 125, 1924, London SIKHIBHUSHAN DUTT "Dyes derived from Carbazole and Thiodiphenylamine" Seiten 802-807 *

Also Published As

Publication number Publication date
BR8001290A (pt) 1980-11-04
DE3060683D1 (en) 1982-09-16
ES489179A1 (es) 1980-08-16
JPS55118477A (en) 1980-09-11
EP0017704B1 (fr) 1982-07-28
DE2908486A1 (de) 1980-09-11

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